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/*
* Copyright 2012 - 2022 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar;
import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import org.traccar.config.Keys;
import org.traccar.database.CommandsManager;
import org.traccar.database.MediaManager;
import org.traccar.database.StatisticsManager;
import org.traccar.helper.UnitsConverter;
import org.traccar.helper.model.AttributeUtil;
import org.traccar.model.Command;
import org.traccar.model.Device;
import org.traccar.model.Position;
import org.traccar.session.ConnectionManager;
import org.traccar.session.DeviceSession;
import org.traccar.session.cache.CacheManager;
import org.traccar.storage.StorageException;
import jakarta.inject.Inject;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.Collection;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
import java.util.TimeZone;
public abstract class BaseProtocolDecoder extends ExtendedObjectDecoder {
private static final String PROTOCOL_UNKNOWN = "unknown";
private final Protocol protocol;
private CacheManager cacheManager;
private ConnectionManager connectionManager;
private StatisticsManager statisticsManager;
private MediaManager mediaManager;
private CommandsManager commandsManager;
public BaseProtocolDecoder(Protocol protocol) {
this.protocol = protocol;
}
public CacheManager getCacheManager() {
return cacheManager;
}
@Inject
public void setCacheManager(CacheManager cacheManager) {
this.cacheManager = cacheManager;
}
@Inject
public void setConnectionManager(ConnectionManager connectionManager) {
this.connectionManager = connectionManager;
}
@Inject
public void setStatisticsManager(StatisticsManager statisticsManager) {
this.statisticsManager = statisticsManager;
}
@Inject
public void setMediaManager(MediaManager mediaManager) {
this.mediaManager = mediaManager;
}
@Inject
public void setCommandsManager(CommandsManager commandsManager) {
this.commandsManager = commandsManager;
}
public CommandsManager getCommandsManager() {
return commandsManager;
}
public String writeMediaFile(String uniqueId, ByteBuf buf, String extension) {
return mediaManager.writeFile(uniqueId, buf, extension);
}
public String getProtocolName() {
return protocol != null ? protocol.getName() : PROTOCOL_UNKNOWN;
}
public String getServer(Channel channel, char delimiter) {
String server = getConfig().getString(Keys.PROTOCOL_SERVER.withPrefix(getProtocolName()));
if (server == null && channel != null) {
InetSocketAddress address = (InetSocketAddress) channel.localAddress();
server = address.getAddress().getHostAddress() + ":" + address.getPort();
}
return server != null ? server.replace(':', delimiter) : null;
}
protected double convertSpeed(double value, String defaultUnits) {
switch (getConfig().getString(getProtocolName() + ".speed", defaultUnits)) {
case "kmh":
return UnitsConverter.knotsFromKph(value);
case "mps":
return UnitsConverter.knotsFromMps(value);
case "mph":
return UnitsConverter.knotsFromMph(value);
case "kn":
default:
return value;
}
}
protected TimeZone getTimeZone(long deviceId) {
return getTimeZone(deviceId, "UTC");
}
protected TimeZone getTimeZone(long deviceId, String defaultTimeZone) {
TimeZone result = TimeZone.getTimeZone(defaultTimeZone);
String timeZoneName = AttributeUtil.lookup(cacheManager, Keys.DECODER_TIMEZONE, deviceId);
if (timeZoneName != null) {
result = TimeZone.getTimeZone(timeZoneName);
}
return result;
}
public DeviceSession getDeviceSession(Channel channel, SocketAddress remoteAddress, String... uniqueIds) {
try {
return connectionManager.getDeviceSession(protocol, channel, remoteAddress, uniqueIds);
} catch (StorageException e) {
throw new RuntimeException(e);
}
}
public void getLastLocation(Position position, Date deviceTime) {
if (position.getDeviceId() != 0) {
position.setOutdated(true);
Position last = cacheManager.getPosition(position.getDeviceId());
if (last != null) {
position.setFixTime(last.getFixTime());
position.setValid(last.getValid());
position.setLatitude(last.getLatitude());
position.setLongitude(last.getLongitude());
position.setAltitude(last.getAltitude());
position.setSpeed(last.getSpeed());
position.setCourse(last.getCourse());
position.setAccuracy(last.getAccuracy());
} else {
position.setFixTime(new Date(0));
}
if (deviceTime != null) {
position.setDeviceTime(deviceTime);
} else {
position.setDeviceTime(new Date());
}
}
}
@Override
protected void onMessageEvent(
Channel channel, SocketAddress remoteAddress, Object originalMessage, Object decodedMessage) {
if (statisticsManager != null) {
statisticsManager.registerMessageReceived();
}
Set<Long> deviceIds = new HashSet<>();
if (decodedMessage != null) {
if (decodedMessage instanceof Position) {
deviceIds.add(((Position) decodedMessage).getDeviceId());
} else if (decodedMessage instanceof Collection) {
Collection<Position> positions = (Collection) decodedMessage;
for (Position position : positions) {
deviceIds.add(position.getDeviceId());
}
}
}
if (deviceIds.isEmpty()) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession != null) {
deviceIds.add(deviceSession.getDeviceId());
}
}
for (long deviceId : deviceIds) {
connectionManager.updateDevice(deviceId, Device.STATUS_ONLINE, new Date());
sendQueuedCommands(channel, remoteAddress, deviceId);
}
}
protected void sendQueuedCommands(Channel channel, SocketAddress remoteAddress, long deviceId) {
for (Command command : commandsManager.readQueuedCommands(deviceId)) {
protocol.sendDataCommand(channel, remoteAddress, command);
}
}
@Override
protected Object handleEmptyMessage(Channel channel, SocketAddress remoteAddress, Object msg) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (getConfig().getBoolean(Keys.DATABASE_SAVE_EMPTY) && deviceSession != null) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, null);
return position;
} else {
return null;
}
}
}
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